* Initial import of index path
 * Use LevelDBStore to permenant store index path map.
 * Make the test case compile-able
 * Change the signature of IndexPathMap::collect.
 + Insert a new record into the leveldb store when insert a new index name.
 * clean up IndexPathMap::insert()
Merge branch 'master' into index_path_map
 + Added IndexPathMap::remove()
 + Added test case for IndexPathMap::remove()
 + Added IndexPathMap::has()
 + Added a simple test case for IndexPathMap::remove(string)
Merge pull request #10 from vsfs/index_path_map

Namespace of indices